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<p>In order to address the critical challenge of achieving high-strength bonding in stainless steel/titanium alloy composite plates, this study innovatively proposes a two-pass vacuum hot rolling composite process with corrugated-flat two-pass for fabricating 316H/TC4 composite plates. Through a series of rolling temperature experiments conducted at 850-950&#xa0;°C and employing ABAQUS simulations, the temperature-dependent regulation mechanism on interfacial microstructure and mechanical properties was elucidated. It was revealed that optimal metallurgical bonding, characterized by the presence of beneficial Fe-Ti compounds and ductile fracture, was achieved at 900&#xa0;°C. Conversely, at 950&#xa0;°C, a substantial quantity of brittle IMCs results in a substantial decrease in strength. The tensile strength of the composite plate exhibited a slight increase with an increase in temperature; however, the failure elongation decreased. According to the findings of the simulation, the process of single-pass corrugated rolling exerts significant strain in the valley regions, facilitating metal flow through multiple slip zones (FRZ/BRZ). This phenomenon is observed to enhance the bonding area. Subsequent flat rolling has been demonstrated to flatten interfaces and avoid shear stress concentration, thereby preventing cracking. This process offers a novel approach for high-performance fabrication of dissimilar metal composite plates.</p>

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Research on Strengthening Mechanism of Interface Bonding and Mechanical Properties of 316H/TC4 Composite Plates by Corrugated-Flat Two-Pass Vacuum Hot Rolling Process

  • 期刊论文

  • 发表日期：

    2026年3月12日

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  • Quan Li,
  • Qinhong Fan,
  • Lifeng Ma,
  • Zhihui Cai,
  • Junyi Lei,
  • Shiyi Zhang,
  • Xiping Zhang,
  • Jingfeng Zou

摘要

In order to address the critical challenge of achieving high-strength bonding in stainless steel/titanium alloy composite plates, this study innovatively proposes a two-pass vacuum hot rolling composite process with corrugated-flat two-pass for fabricating 316H/TC4 composite plates. Through a series of rolling temperature experiments conducted at 850-950 °C and employing ABAQUS simulations, the temperature-dependent regulation mechanism on interfacial microstructure and mechanical properties was elucidated. It was revealed that optimal metallurgical bonding, characterized by the presence of beneficial Fe-Ti compounds and ductile fracture, was achieved at 900 °C. Conversely, at 950 °C, a substantial quantity of brittle IMCs results in a substantial decrease in strength. The tensile strength of the composite plate exhibited a slight increase with an increase in temperature; however, the failure elongation decreased. According to the findings of the simulation, the process of single-pass corrugated rolling exerts significant strain in the valley regions, facilitating metal flow through multiple slip zones (FRZ/BRZ). This phenomenon is observed to enhance the bonding area. Subsequent flat rolling has been demonstrated to flatten interfaces and avoid shear stress concentration, thereby preventing cracking. This process offers a novel approach for high-performance fabrication of dissimilar metal composite plates.